Must Be Knights is a uncommon Creature — Human Knight card from Unknown Event (UNK), collector number UR02a. Current market price: $17.00, TCGplayer market prices via Scryfall.
Haste Whenever Must Be Knights attacks, if defending player controls an Enchanting Tale, Must Be Knights deals damage equal to its power to any target. (Enchanting Tales have the expansion code WOT. Other versions of them don't count.)